1. Overview
The INKBIRD ICC-510 is a plug-and-play CO2 controller equipped with a professional-grade CO2 sensor, manufactured to ANSI/ASHRAE Standard 62.1-2022+Addendum ab (31 October 2023) RESET Grade B. It offers two primary modes: Plant Mode and Human Mode, catering to diverse usage scenarios.
- Plant Mode: Ideal for environments requiring elevated CO2 levels during lighting periods, such as plant tents and greenhouses. A built-in photo sensor automatically detects light, enabling or disabling CO2 output accordingly.
- Human Mode: Suitable for indoor spaces with daily human activity. It continuously monitors CO2 levels and activates an exhaust fan when necessary to maintain a healthy and comfortable living environment.

2. Product Components and Control Panel
The ICC-510 consists of a main controller unit and a separate CO2 sensor module. Familiarize yourself with the components and control panel for effective operation.
2.1 Control Panel
The main controller features a display and control buttons:

- Day/Time Indicator Light: Flashes in daytime mode, dims in nighttime mode.
- CO2 Indicator Light: Illuminates when the CO2 outlet is active.
- SET Button: Press and hold to enter/exit setting mode.
- Increase/Decrease Buttons (▲/▼): Used to adjust parameters in setting mode.
- CO2 Display Screen: Shows current CO2 level during operation, or set value during configuration.
- SV Display Screen: Shows STOP value, START value, and BoFF during operation, or menu characters during configuration.
- FAN Indicator Light: Illuminates when the FAN outlet is active.
2.2 Outlets
The controller unit includes two power outlets for connecting external devices.

- CO2 Outlet: Connect your CO2 device (e.g., CO2 generator, CO2 regulator & tank) here.
- FAN Outlet: Connect your air ventilation fan (e.g., exhaust fan) here.
2.3 Product Size and Cords

3. Setup
3.1 Install CO2 Sensor
Connect the CO2 sensor module to the main controller unit. Ensure the connection is secure.

Notice: Do not break the white mask on the sensor as this may damage the internal components of the sensor.
3.2 Power On
Plug the controller into a power source. The screen will display a startup sequence:
- Initially, the screen will display "8888".
- After 3 seconds, it will show "-----".
- After another 3 seconds, it will display numeric values, indicating it's ready for operation.
4. Operating Instructions
4.1 Menu and Symbols Overview
The controller uses various symbols and menu options to configure its operation. Here's a summary:
| SV Display Screen | Meaning | CO2 Display Screen | Function Description | Range |
|---|---|---|---|---|
| CF | CO2 or Fan | CO2 | Plant mode without fan | / |
| both | Plant mode with fan | / | ||
| FAN | Human mode | / | ||
| Con | CO2 on value | 1200ppm (custom) | CO2 outlet turns on when CO2 ≤ set value | 0~9950 ppm |
| COFF | CO2 off value | 1600ppm (custom) | CO2 outlet turns off when CO2 ≥ set value | 50~9999 ppm |
| Fon | Fan on value | 2000ppm (custom) | FAN outlet turns on when CO2 ≥ set value | 50~9999 ppm |
| FoFF | Fan off value | 1600ppm (custom) | FAN outlet turns off when CO2 ≤ set value | 0~9950 ppm |
| CAL | Calibration | 0 (custom) | CO2 calibration value | -200~200 ppm |
| ALA | Alarm | ON/OFF | Enable/Disable high/low CO2 level alarm | / |
| AH | Alarm high value | 9999ppm (custom) | Beeps when CO2 ≥ set value | 50~9999 ppm |
| AL | Alarm low value | 0 (custom) | Beeps when CO2 ≤ set value | 0~9950 ppm |
| PCAL | Professional calibration | 400ppm (custom) | Professional CO2 calibration | 0~9900 ppm |
4.2 Program the Parameters
The ICC-510 offers three main operational modes, each with specific parameter settings:

4.2.1 Plant Mode without Fan (CO2 Device Only)
This mode is for controlling only CO2 devices (e.g., CO2 regulator or generator). The photo sensor will turn the CO2 outlet on/off based on set values when there is light, but keep it off when there is no light, regardless of set values.
- Press and hold the SET button to enter setting mode.
- Use ▲/▼ to select "CO2" (CF screen displays CO2), then press SET.
- Adjust CO2 start value (Con) and CO2 stop value (COFF) using ▲/▼, pressing SET after each. (CO2 Stop value must be ≥ CO2 Start value).
- Set calibration value (CAL) if needed.
4.2.2 Plant Mode with Fan (CO2 Device and Ventilation Fan)
This mode controls both a CO2 device and a ventilation fan simultaneously. The photo sensor only affects the CO2 outlet; the fan outlet operates based on set values regardless of light.
- Press and hold the SET button to enter setting mode.
- Use ▲/▼ to select "both" (CF screen displays both), then press SET.
- Adjust CO2 start value (Con) and CO2 stop value (COFF) using ▲/▼, pressing SET after each. (CO2 Stop value must be ≥ CO2 Start value).
- Adjust FAN start value (Fon) and FAN stop value (FoFF) using ▲/▼, pressing SET after each. (FAN Start value must be ≥ FAN Stop value).
- Set calibration value (CAL) if needed.
4.2.3 Human Mode (Ventilation Fan Only)
This mode is for controlling only ventilation fans. The fan outlet operates based on set values regardless of light.
- Press and hold the SET button to enter setting mode.
- Use ▲/▼ to select "FAN" (CF screen displays FAN), then press SET.
- Adjust FAN start value (Fon) and FAN stop value (FoFF) using ▲/▼, pressing SET after each. (FAN Start value must be ≥ FAN Stop value).
- Set calibration value (CAL) if needed.
4.3 CO2 Calibration
The controller supports two methods for CO2 calibration:

4.3.1 General Calibration
Use this method to manually adjust the CO2 reading if you suspect a bias.
- Press and hold SET for 2 seconds to enter setting mode.
- Press SET to cycle through menus until SV screen displays "CAL".
- Use ▲/▼ to adjust the calibration parameter.
- Press and hold SET for 2 seconds to save and exit.
4.3.2 Professional Calibration
This method performs an automatic calibration. It is recommended to perform this in a ventilated outdoor environment with a stable CO2 level (e.g., 400ppm).
- With the controller running, press and hold ▲ and ▼ buttons simultaneously for 2 seconds until the SV screen displays "PCAL" and the CO2 screen displays "400ppm" (default). Release both buttons.
- Use ▲/▼ to adjust the target calibration value if different from 400ppm.
- Press and hold SET for 2 seconds to start calibration. The CO2 screen will display "---" and flash.
- Calibration takes 1 to 20 minutes.
- Upon completion, the CO2 screen will display "PASS" (successful) or "FAIL" (failed). Press any button to exit.
NOTE: If the CO2 level fluctuates greatly during calibration, use general calibration instead. Do not exhale into the sensor during automatic calibration.
4.4 Alarm Setting
The ICC-510 provides high and low CO2 level alarms to ensure a safe environment.

4.4.1 Enable the Audible Alarm
- Press and hold the SET button for 2 seconds to enter setting mode.
- Press SET to switch to "ALA" (Alarm).
- Use ▲/▼ to select "ON" (SV screen displays ON).
- Set the high (AH) and low (AL) alarm values using ▲/▼, pressing SET after each.
4.4.2 Disable the Audible Alarm
- Press and hold the SET button for 2 seconds to enter setting mode.
- Press SET to switch to "ALA" (Alarm).
- Use ▲/▼ to select "OFF" (SV screen displays OFF).
NOTE: If the device is sounding an alarm, press any button to stop the alarm.
4.5 Factory Reset
To restore the controller to its factory default settings:
- Disconnect the controller from the power supply.
- While pressing and holding the ▼ button, reconnect it to the power supply.
- Continue holding the ▼ button until you hear a beep, indicating a successful factory reset.
- Release the ▼ button. The screen will return to normal in a few seconds.
5. Maintenance
5.1 Cleaning and Care
- The white mask on the CO2 sensor must remain intact. Do not break it, as this may damage internal components.
- Keep both the photo sensor and CO2 sensor free from dust. Periodically use a dry cloth to remove dust to prevent light sensing malfunctions, erroneous CO2 readings, and slow response.
- Do not cover the photo sensor or seal the CO2 sensor during use, as this may cause the device to fail to operate normally.
- When not in use, clean the product immediately and store it in a dry place.
6. Troubleshooting Guide
If you encounter issues with your ICC-510 controller, refer to the table below for common problems and their solutions.
| NO. | Issue | Cause | Solution |
|---|---|---|---|
| 1 | Displaying "Er" | 1) CO2 sensor not plugged in. 2) CO2 sensor has a poor connection. | Properly insert the CO2 sensor. |
| 2 | Displaying "----" or "8888" | 1) Normal during startup. 2) Unstable power supply. 3) Normal during professional calibration. | 1) Wait 6 seconds. 2) Ensure power plug is inserted correctly. 3) Wait 1 to 20 minutes. |
| 3 | Output cannot be turned on or off | 1) Connected device has poor connection or is damaged. 2) Relay malfunction. | 1) Ensure device is properly plugged in and not damaged. 2) Contact customer support. |
| 4 | Incorrect CO2 readings | CO2 measurement is incorrect. | Perform General Calibration (CAL). |
| 5 | Displaying "FAIL PCAL" during calibration | CO2 concentration in environment varies greatly. | Place sensor in a stable CO2 environment for calibration. |
7. Technical Specifications
7.1 Controller
- Brand: INKBIRD
- Model Number: ICC-510
- Input Power: 100~240Vac 50/60Hz 10A MAX
- Output Power: 100~240Vac 50/60Hz 10A MAX
- Operating Environment Temperature: 0~50℃ / 32~122℉
- Operating Environment Humidity: 0~95% RH (non-condensing)
- Storage Environment Temperature: 0~60℃ / 32~140℉
- Storage Environment Humidity: 20~80% RH (unfrozen or non-condensing state)
7.2 CO2 Sensor
- Measurement Interval: Every 1 second
- Measurement Range: 0~9999 ppm
- Sensing Method: NDIR (Non-dispersive infrared)
- Accuracy: ±(50ppm+5%) in the range of 400~9999ppm
8. Important Notes and Warnings
To ensure proper and safe use of this product, please read this manual carefully and thoroughly before using the CO2 Controller. These warnings contain important safety information that should be followed during use:
- Keep the device away from children and out of their reach.
- Do not subject the device to shock or vibration as this may affect the accuracy of the sensor.
- Do not place the device or the power plug near a heat source. Heat will deform the device and cause a fire.
- Do not disassemble the CO2 controller or touch exposed electronic circuitry as this may result in an electric shock.
- Connect the controller only to a grounded power outlet. Failure to do so may result in serious damage to the product or personal injury or death to the user.
9. Warranty and Support
The controller is warranted for 2 years (5 years for the CO2 sensor) against defects in either components or workmanship. During this period, products that prove to be defective will, at the discretion of INKBIRD, be either repaired or replaced without charge.
For any problems in use, please feel free to contact us at support@inkbird.com. We will do our best to help you.
Manufacturer: Shenzhen Inkbird Technology Co., Ltd.
Office Address: Room 1803, Guowei Building, No.68 Guowei Road, Xianhu Community, Liantang, Luohu District, Shenzhen, China
For additional resources, including product usage videos, you can visit the official INKBIRD website by scanning the QR code provided in the original user manual PDF: View User Manual (PDF)
10. Product Video
Watch this video for a visual demonstration of the INKBIRD ICC-510 CO2 Controller in action, showcasing its features and setup.





